perf_counter tools: Work around warnings in older GCCs

GCC 4.1.2 produces:

 util/parse-options.c: In function ‘get_value’:
 util/parse-options.c:36: warning: ‘arg’ may be used uninitialized in this function

 builtin-top.c: In function ‘display_thread’:
 builtin-top.c:178: warning: ‘printed’ may be used uninitialized in this function

Annotate them away by initializing these variables to 0.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 2 insertions, 2 deletions

diff --git a/Documentation/perf_counter/builtin-top.c b/Documentation/perf_counter/builtin-top.c
index 16a618446d3f..7c907e25d82b 100644
--- a/Documentation/perf_counter/builtin-top.c
+++ b/Documentation/perf_counter/builtin-top.c
@@ -175,7 +175,7 @@ static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
 
 static void print_sym_table(void)
 {
-        int printed, j;
+        int printed = 0, j;
         int counter;
         float events_per_sec = events/delay_secs;
         float kevents_per_sec = (events-userspace_events)/delay_secs;
diff --git a/Documentation/perf_counter/util/parse-options.c b/Documentation/perf_counter/util/parse-options.c
index b80abd9a99bc..551b6bc34e79 100644
--- a/Documentation/perf_counter/util/parse-options.c
+++ b/Documentation/perf_counter/util/parse-options.c
@@ -33,7 +33,7 @@ static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
 static int get_value(struct parse_opt_ctx_t *p,
                      const struct option *opt, int flags)
 {
-        const char *s, *arg;
+        const char *s, *arg = NULL;
         const int unset = flags & OPT_UNSET;
 
         if (unset && p->opt)